[llvm] r190556 - [CMake] Update GetSVN.cmake to use LLVM version control helper scripts.

[Jordan Rose]

Author: jrose
Date: Wed Sep 11 17:46:41 2013
New Revision: 190556

URL: http://llvm.org/viewvc/llvm-project?rev=190556&view=rev
Log:
[CMake] Update GetSVN.cmake to use LLVM version control helper scripts.

This allows the logic to work with Git, and also uses the variable names
to match what Clang is actually looking for.

This changes the interface of GetSVN.cmake. Clang change to follow.

Modified:
    llvm/trunk/cmake/modules/GetSVN.cmake

Modified: llvm/trunk/cmake/modules/GetSVN.cmake
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/cmake/modules/GetSVN.cmake?rev=190556&r1=190555&r2=190556&view=diff
==============================================================================
--- llvm/trunk/cmake/modules/GetSVN.cmake (original)
+++ llvm/trunk/cmake/modules/GetSVN.cmake Wed Sep 11 17:46:41 2013
@@ -2,24 +2,41 @@
 #
 # Input variables:
 #   FIRST_SOURCE_DIR  - First source directory
-#   FIRST_REPOSITORY  - The macro to define to the first revision number.
-#   SECOND_SOURCE_DIR - Second source directory
-#   SECOND_REPOSITORY - The macro to define to the second revision number.
+#   FIRST_NAME        - The macro prefix for the first repository's info
+#   SECOND_SOURCE_DIR - Second source directory (opt)
+#   SECOND_NAME       - The macro prefix for the second repository's info (opt)
 #   HEADER_FILE       - The header file to write
-include(FindSubversion)
-if (Subversion_FOUND AND EXISTS "${FIRST_SOURCE_DIR}/.svn")
-  # Repository information for the first repository.
-  Subversion_WC_INFO(${FIRST_SOURCE_DIR} MY)
-  file(WRITE ${HEADER_FILE}.txt "#define ${FIRST_REPOSITORY} \"${MY_WC_REVISION}\"\n")
+#
+# The output header will contain macros FIRST_REPOSITORY and FIRST_REVISION,
+# and SECOND_REPOSITORY and SECOND_REVISION if requested, where "FIRST" and
+# "SECOND" are substituted with the names specified in the input variables.
+
+# Chop off cmake/modules/GetSVN.cmake 
+get_filename_component(LLVM_DIR "${CMAKE_SCRIPT_MODE_FILE}" PATH)
+get_filename_component(LLVM_DIR "${LLVM_DIR}" PATH)
+get_filename_component(LLVM_DIR "${LLVM_DIR}" PATH)
 
-  # Repository information for the second repository.
-  if (EXISTS "${SECOND_SOURCE_DIR}/.svn")
-    Subversion_WC_INFO(${SECOND_SOURCE_DIR} MY)
-    file(APPEND ${HEADER_FILE}.txt 
-      "#define ${SECOND_REPOSITORY} \"${MY_WC_REVISION}\"\n")
-  endif ()
+function(append_info name path)
+  execute_process(COMMAND "${LLVM_DIR}/utils/GetSourceVersion" "${path}"
+    OUTPUT_VARIABLE revision)
+  string(STRIP "${revision}" revision)
+  execute_process(COMMAND "${LLVM_DIR}/utils/GetRepositoryPath" "${path}"
+    OUTPUT_VARIABLE repository
+    OUTPUT_STRIP_TRAILING_WHITESPACE)
+  string(STRIP "${repository}" repository)
+  file(APPEND "${HEADER_FILE}.txt"
+    "#define ${name}_REVISION \"${revision}\"\n")
+  file(APPEND "${HEADER_FILE}.txt"
+    "#define ${name}_REPOSITORY \"${repository}\"\n")
+endfunction()
 
-  # Copy the file only if it has changed.
-  execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
-    ${HEADER_FILE}.txt ${HEADER_FILE})
+append_info(${FIRST_NAME} "${FIRST_SOURCE_DIR}")
+if(DEFINED SECOND_SOURCE_DIR)
+  append_info(${SECOND_NAME} "${SECOND_SOURCE_DIR}")
 endif()
+
+# Copy the file only if it has changed.
+execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
+  "${HEADER_FILE}.txt" "${HEADER_FILE}")
+file(REMOVE "${HEADER_FILE}.txt")
+